Abstract: Plant for powder coating the surfaces of objects with polymeric powder having a melting and softening temperature below 100° C. The polymeric powder includes a polymer curable under the influence of electromagnetic radiation. Objects to be coated are prepared to retain powder charged with static electricity. The objects are then sprayed with powder charged with static electricity and thereafter heated to a surface temperature of about 100° C. thereby melting the powder retained on the surface by exposure to infrared radiation and heated air. The objects are radiated by electromagnetic radiation for curing of the powder over the surface of the objects.

Abstract: Method and plant for powder coating the surfaces of objects with polymeric powder having a melting and softening temperature near 100° C., said polymeric powder includes a polymer curable under the influence of electromagnetic radiation, the method including a first step in which the objects to be coated are prepared to retain powder charged with static electricity; a second step in which the objects are sprayed with powder charged with static electricity; a third step in which the objects are heated to a surface temperature of about 100° C. thereby melting the powder retained on the surfaces by being expose the objects to infrared radiation and heated air; a fourth step in which the objects are radiated by electromagnetic radiation for initiating of curing of the powder melted to reflow over the surfaces of the objects, the objects simultaneous with the radiation being cooled.

Abstract: A device at a heat treatment oven of the type using a combination of radiation heat and convection heat, and where in connection to the oven chamber are provided means (4, 19) arranged to circulate the oven atmosphere through the oven chamber and a channel (20, 21) situated outside the oven chamber and back to the oven chamber, whereby the device incorporates a gas burner (7) arranged at combustion to emit its flame in a direction, which at least partly touches or coincides with the circulation channel (20, 21) for the oven atmosphere, and where the gas burner (7) is arranged to direct its flame into a vessel (22), provided in the circulation channel (20, 21) for the circulating atmosphere.